I come back on this thread to bring you the answer:
it was a ME109 and details are as follows:
1943-11-11, 2./JG 101, Bf 109E-7, 5145, 5 rote, Bei Argèles, Absturz. Bruch 100 %.
Flugzeugführer Gefr Riemer, Kurt, tot
Grab: Berneuil/Frankreich, Block 8, Reihe 12, Grab 301
(info from another thread)
So you were right Andy, it was a 109,
most probably a learning 109 from Pau or Tarbes; you can see vey well on Thomas Genth website :
http://www.thomasgenth.de/html/jg_101_pau.html
some 109 with special devices under the wings to help young pilots to take; This 109 we found may be one of these.
If any body has info or data about the pilot, they are welcome.
Have a nice week-end, all.
GC